Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	Feb. 28, 2021	Dec. 31, 2023	Dec. 31, 2021	Dec. 31, 2022
Class Of Stock [Line Items]
Common stock, shares authorized (in shares)		400,000,000.0		400,000,000.0
Issuance of common stock		$ 25	$ 220
Common stock, par value (in dollars per share)		$ 0.0001		$ 0.0001
Preferred stock, shares authorized (in shares)		10,000,000
Preferred stock, par value (in dollars per share)		$ 0.0001
Preferred stock, shares outstanding (in shares)		0		0
At-the-Market Facility
Class Of Stock [Line Items]
Sale of stock authorized consideration on transaction		$ 200
Sale of stock, number of shares issued in transaction (in shares)		200,000
Sale of stock, consideration received on transaction		$ 5
Second Stock Purchase Agreement | Gilead
Class Of Stock [Line Items]
Issuance of common stock (in shares)		1,000,000
Issuance of common stock		$ 20
Weighted average closing price of our common stock on grant date (in dollars per share)		$ 19.26
Gilead | Common Stock Purchase Agreement
Class Of Stock [Line Items]
Issuance of common stock (in shares)	5,700,000
Shares issued, price per share (in dollars per share)	$ 39.00
Issuance of common stock	$ 220